RustyBadRobot

Rusty Social Image Share resizes your post thumbnail to perfectly fit to the Facebook Share dimensions whilst keeping your original image dimensions.
See the <a href="https://wordpress.org/extend/plugins/rusty-image-share/screenshots/" rel="ugc">screenshots tab</a> for more details.

Rusty Social Image Share

Keep your original Featured Image proportions whilst sharing to Facebook.

Shane Bishop

Pedro Elsner

Force Regenerate Thumbnails allows you to delete all old images sizes and REALLY regenerate the thumbnails for your uploads.
Regenerate all thumbnails from the Tools admin menu. Regenerate batches of images via the Media Library list mode. Select the images to regenerate and then use the Bulk Actions drop-down menu to Force Regenerate Thumbnails. Use attachment actions to regenerate thumbnails for a single image.
Several filters exist for advanced usage. See more via <a href="https://gist.github.com/nosilver4u/eb858df10521aece2044a3a15ccdd17b" rel="nofollow ugc">this gist</a>.
You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. <a href="https://patchstack.com/database/vdp/force-regenerate-thumbnails" rel="nofollow ugc">Report a security vulnerability.</a>

Force Regenerate Thumbnails

Delete and REALLY force thumbnail regeneration.

Rusty Social Image Share vs Force Regenerate Thumbnails